4x^2+15x-236=0

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Solution for 4x^2+15x-236=0 equation:


Simplifying
4x2 + 15x + -236 = 0

Reorder the terms:
-236 + 15x + 4x2 = 0

Solving
-236 + 15x + 4x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
4 the coefficient of the squared term: 

Divide each side by '4'.
-59 + 3.75x + x2 = 0

Move the constant term to the right:

Add '59' to each side of the equation.
-59 + 3.75x + 59 + x2 = 0 + 59

Reorder the terms:
-59 + 59 + 3.75x + x2 = 0 + 59

Combine like terms: -59 + 59 = 0
0 + 3.75x + x2 = 0 + 59
3.75x + x2 = 0 + 59

Combine like terms: 0 + 59 = 59
3.75x + x2 = 59

The x term is 3.75x.  Take half its coefficient (1.875).
Square it (3.515625) and add it to both sides.

Add '3.515625' to each side of the equation.
3.75x + 3.515625 + x2 = 59 + 3.515625

Reorder the terms:
3.515625 + 3.75x + x2 = 59 + 3.515625

Combine like terms: 59 + 3.515625 = 62.515625
3.515625 + 3.75x + x2 = 62.515625

Factor a perfect square on the left side:
(x + 1.875)(x + 1.875) = 62.515625

Calculate the square root of the right side: 7.9066823

Break this problem into two subproblems by setting 
(x + 1.875) equal to 7.9066823 and -7.9066823.

Subproblem 1

x + 1.875 = 7.9066823 Simplifying x + 1.875 = 7.9066823 Reorder the terms: 1.875 + x = 7.9066823 Solving 1.875 + x = 7.9066823 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.875' to each side of the equation. 1.875 + -1.875 + x = 7.9066823 + -1.875 Combine like terms: 1.875 + -1.875 = 0.000 0.000 + x = 7.9066823 + -1.875 x = 7.9066823 + -1.875 Combine like terms: 7.9066823 + -1.875 = 6.0316823 x = 6.0316823 Simplifying x = 6.0316823

Subproblem 2

x + 1.875 = -7.9066823 Simplifying x + 1.875 = -7.9066823 Reorder the terms: 1.875 + x = -7.9066823 Solving 1.875 + x = -7.9066823 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1.875' to each side of the equation. 1.875 + -1.875 + x = -7.9066823 + -1.875 Combine like terms: 1.875 + -1.875 = 0.000 0.000 + x = -7.9066823 + -1.875 x = -7.9066823 + -1.875 Combine like terms: -7.9066823 + -1.875 = -9.7816823 x = -9.7816823 Simplifying x = -9.7816823

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6.0316823, -9.7816823}

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